Patents by Inventor Zhiyong Wei

Zhiyong Wei has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9518492
    Abstract: An exhaust system for use with a combustion engine is disclosed. The exhaust system may have an exhaust passageway, a reduction catalyst, a reductant injector, and a controller. The controller may have a NOX/reductant relationship map, and be configured to receive a first input relating to an amount of NOX within the exhaust passageway upstream of the reduction catalyst, and reference the NOX/reductant relationship map to determine an initial amount of reductant that should be directed into the exhaust passageway based on the first input. The controller may also be configured to receive a second input relating to performance of the reduction catalyst, determine an adjustment to the initial amount of reductant based on the second input, and regulate operation of the reductant injector to direct an adjusted amount of reductant into the exhaust passageway. The controller may further be configured to update the NOX/reductant relationship map based on the determined adjustment.
    Type: Grant
    Filed: April 23, 2008
    Date of Patent: December 13, 2016
    Assignee: Caterpillar Inc.
    Inventors: Mary Lou Kesse, Zhiyong Wei, Liangtao Zhu
  • Patent number: 8738241
    Abstract: A machine having a pump overspeed protection system operating thereon includes an internal combustion engine, a plurality of ground engaging elements, and a drivetrain coupling the internal combustion engine and the ground engaging elements. The drivetrain includes a torque converter having a locked configuration and an unlocked configuration. The machine also includes a plurality of pumps driven by the internal combustion engine. An electronic control is in communication with the internal combustion engine, the torque converter, and the plurality of pumps.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: May 27, 2014
    Assignee: Caterpillar Inc.
    Inventors: Michael Evan Hague, Sameer Marathe, Zhiyong Wei, Matthew Stephen Marquette
  • Publication number: 20120310489
    Abstract: A machine having a pump overspeed protection system operating thereon includes an internal combustion engine, a plurality of ground engaging elements, and a drivetrain coupling the internal combustion engine and the ground engaging elements. The drivetrain includes a torque converter having a locked configuration and an unlocked configuration. The machine also includes a plurality of pumps driven by the internal combustion engine. An electronic control is in communication with the internal combustion engine, the torque converter, and the plurality of pumps.
    Type: Application
    Filed: May 31, 2011
    Publication date: December 6, 2012
    Applicant: CATERPILLAR, INC.
    Inventors: Michael Evan Hague, Sameer Marathe, Zhiyong Wei, Matthew Stephen Marquette
  • Patent number: 8276371
    Abstract: An exhaust system for an internal combustion engine includes an upstream segment and a downstream segment connecting with the upstream segment. The downstream segment is a NOx reducing segment having an exhaust gas outlet and a reductant inlet disposed between the exhaust gas outlet and an exhaust gas inlet for the downstream segment. The upstream segment further includes a coating having a catalyst configured to increase a ratio of NO2 to NO in exhaust gases passing through the upstream segment. The coating includes a catalyst distribution, which may be a catalyst coating length, which is linked to a target ratio of NO2 to NO for reducing NOx in the downstream segment. The catalyst distribution in the upstream segment is adapted to increase the ratio of NO2 to NO, while limiting the ratio of NO2 to NO to a ratio optimized for reduction of NOx in the downstream segment.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: October 2, 2012
    Assignee: Caterpillar Inc.
    Inventor: Zhiyong Wei
  • Patent number: 8209956
    Abstract: An emissions control system is disclosed. The emissions control system may have an SCR device that receives a flow of exhaust. The emissions control system may also have an injector that introduces a reduction agent into the flow of exhaust at or upstream of a catalyst within the SCR device. The emissions control system may have a controller in communication with the injector, the controller being configured to calculate a first amount of the reduction agent by using an approximation that at least one of a plurality of SCR reactions must be completed before the remaining SCR reactions commence. The controller may also be configured to adjust the injector according to at least the first amount.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: July 3, 2012
    Assignee: Caterpillar Inc.
    Inventors: Zhiyong Wei, Cho Ying Liang
  • Publication number: 20120126671
    Abstract: The present invention discloses a stereo displaying cabinet with an explosion-proof film comprising: an outer frame with a transparent layer; an automotive explosion-proof film layer which is attached to the transparent layer of the outer frame; a stereo rack, wherein several displaying units are formed by several shelves; a base plate with a light source assembly at the rear of the shelves, wherein several light source units are secured on the base plate; a baffle which is disposed between the base plate with the light source assembly and the stereo rack; wherein the outer frame is connected to the base plate with a removable fit; the photic layer of the explosion-proof film is located at the side of the light source units. The stereo displaying cabinet according to the present invention can both attain the two objects of planar display and stereo display, having an excellent advertisement displaying effect.
    Type: Application
    Filed: March 5, 2010
    Publication date: May 24, 2012
    Inventor: Zhiyong Wei
  • Patent number: 8001769
    Abstract: An emissions control system is disclosed. The emissions control system may have a power source that creates a flow of exhaust and a filtering device that receives the flow of exhaust. A first sensor may be located at or upstream of the filtering device, the first sensor being configured to measure a first temperature, and an SCR catalyst may be located downstream of the filtering device. The emissions control system may also have an injector configured to inject a reduction agent into the flow of exhaust in the presence of the SCR catalyst. The emissions control system may further have a controller in communication with the first sensor. The controller may be configured to predict a change in an ability of the SCR catalyst to store reduction agent using a measured change in the first temperature and adjust the injector according to the predicted change in the storage ability of the SCR catalyst.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: August 23, 2011
    Assignee: Caterpillar Inc.
    Inventors: Zhiyong Wei, Theodore M. Kostek, Christopher Alan Sharp
  • Patent number: 7992380
    Abstract: An emissions control system is disclosed. The emissions control system may have a power source that creates a flow of exhaust, an SCR catalyst situated to receive the flow of exhaust, and an injector configured to inject a reduction agent into the flow of exhaust in the presence of the SCR catalyst. The emissions control system may further have a controller configured to calculate a spatially dependent surface coverage of the reduction agent on the SCR catalyst and substantially stop injection of the reduction agent when the spatially dependent surface coverage of the reduction agent exceeds a maximum surface coverage of the reduction agent at one or more spatial locations.
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: August 9, 2011
    Assignee: Caterpillar Inc.
    Inventors: Zhiyong Wei, Christopher Alan Sharp
  • Publication number: 20110030343
    Abstract: An engine exhaust aftertreatment system including a selective catalytic reduction (SCR) system. The SCR system includes a reductant injection system configured to introduce a reductant into a exhaust stream of a engine, a SCR catalysts configured to reduce NOx in the presence of a reductant, and a SCR monitoring system configured to determine temperatures associated with the SCR system. The SCR system also includes a heat source configured to raise the temperature of the exhaust stream and a controller configured to operate the heat source to reach exhaust stream temperatures in the SCR system of at least about 400 degrees Celsius based on the temperature associated with the SCR system.
    Type: Application
    Filed: August 6, 2009
    Publication date: February 10, 2011
    Applicant: Caterpillar Inc.
    Inventors: Matthew Thomas Kiser, Cornelius N. Opris, Alan R. Stockner, Jinhui Sun, Zhiyong Wei
  • Patent number: 7832200
    Abstract: An exhaust system for use with a combustion engine is disclosed. The exhaust system may have an exhaust passageway, and a reduction catalyst disposed within the exhaust passageway. The exhaust system may also have a first sensor located to generate a first signal indicative of an operational parameter of the reduction catalyst, and a second sensor located to generate a second signal indicative of a performance parameter of the reduction catalyst. The exhaust system may further have an injection device located to inject reductant upstream of the reduction catalyst, and a controller in communication with the combustion engine, the first sensor, the second sensor, and the injection device. The controller may be configured to determine a NOX production of the combustion engine, determine an amount of reductant that should be injected based on the NOX production and the first signal, and adjust the amount based on the second signal.
    Type: Grant
    Filed: April 23, 2008
    Date of Patent: November 16, 2010
    Assignee: Caterpillar Inc
    Inventors: Mary Lou Kesse, Chris L. Wynkoop, Zhiyong Wei, Michael S. Lukich, Wade D. Scrivner, Amit Jayachandran
  • Publication number: 20100229539
    Abstract: An engine exhaust aftertreatment system including a selective catalytic reduction (SCR) device. The system contains no significant amount of catalyzed material upstream of the SCR device.
    Type: Application
    Filed: March 16, 2009
    Publication date: September 16, 2010
    Applicant: Caterpillar Inc.
    Inventors: JOHN P. TIMMONS, JAMES J. DRISCOLL, ZHIYONG WEI
  • Publication number: 20100101221
    Abstract: Catalysts, systems, and methods disclosed herein provide for reduced NOx emissions in the exhaust stream of a lean burning engine. The catalysts include two different types of selective catalytic reduction (SCR) catalysts (i.e., two different types of catalysts that may catalytically reduce NOx using a reductant). The first SCR catalyst (116) is an SCR catalyst having a composition that produces a reductant (e.g., an HC-SCR catalyst that produces ammonia) and the second catalyst (118) is an SCR catalyst (e.g., NH3-SCR) having a composition that reduces NOx using the reductant produced by the first SCR catalyst (116).
    Type: Application
    Filed: October 28, 2008
    Publication date: April 29, 2010
    Applicant: Caterpillar Inc.
    Inventors: Sylvain Joseph Charbonnel, Zhiyong Wei, James Joshua Driscoll, Ronald Silver, Corey Stefanick
  • Publication number: 20090301065
    Abstract: An exhaust system for an internal combustion engine includes an upstream segment and a downstream segment connecting with the upstream segment. The downstream segment is a NOx reducing segment having an exhaust gas outlet and a reductant inlet disposed between the exhaust gas outlet and an exhaust gas inlet for the downstream segment. The upstream segment further includes a coating having a catalyst configured to increase a ratio of NO2 to NO in exhaust gases passing through the upstream segment. The coating includes a catalyst distribution, which may be a catalyst coating length, which is linked to a target ratio of NO2 to NO for reducing NOx in the downstream segment. The catalyst distribution in the upstream segment is adapted to increase the ratio of NO2 to NO, while limiting the ratio of NO2 to NO to a ratio optimized for reduction of NOx in the downstream segment.
    Type: Application
    Filed: June 6, 2008
    Publication date: December 10, 2009
    Inventor: Zhiyong Wei
  • Publication number: 20090266059
    Abstract: An exhaust system for use with a combustion engine is disclosed. The exhaust system may have an exhaust passageway, a reduction catalyst, a reductant injector, and a controller. The controller may have a NOX/reductant relationship map, and be configured to receive a first input relating to an amount of NOx within the exhaust passageway upstream of the reduction catalyst, and reference the NOX/reductant relationship map to determine an initial amount of reductant that should be directed into the exhaust passageway based on the first input. The controller may also be configured to receive a second input relating to performance of the reduction catalyst, determine an adjustment to the initial amount of reductant based on the second input, and regulate operation of the reductant injector to direct an adjusted amount of reductant into the exhaust passageway. The controller may further be configured to update the NOX/reductant relationship map based on the determined adjustment.
    Type: Application
    Filed: April 23, 2008
    Publication date: October 29, 2009
    Inventors: Mary Lou Kesse, Zhiyong Wei, Liangtao Zhu
  • Publication number: 20090266058
    Abstract: An exhaust system for use with a combustion engine is disclosed. The exhaust system may have an exhaust passageway, and a reduction catalyst disposed within the exhaust passageway. The exhaust system may also have a first sensor located to generate a first signal indicative of an operational parameter of the reduction catalyst, and a second sensor located to generate a second signal indicative of a performance parameter of the reduction catalyst. The exhaust system may further have an injection device located to inject reductant upstream of the reduction catalyst, and a controller in communication with the combustion engine, the first sensor, the second sensor, and the injection device. The controller may be configured to determine a NOX production of the combustion engine, determine an amount of reductant that should be injected based on the NOX production and the first signal, and adjust the amount based on the second signal.
    Type: Application
    Filed: April 23, 2008
    Publication date: October 29, 2009
    Inventors: Mary Lou Kesse, Chris L. Wynkoop, Zhiyong Wei, Michael S. Lukich, Wade D. Scrivner, Amit Jayachandran
  • Publication number: 20090049827
    Abstract: An emissions control system is disclosed. The emissions control system may have a power source that creates a flow of exhaust, an SCR catalyst situated to receive the flow of exhaust, and an injector configured to inject a reduction agent into the flow of exhaust in the presence of the SCR catalyst. The emissions control system may further have a controller configured to calculate a spatially dependent surface coverage of the reduction agent on the SCR catalyst and substantially stop injection of the reduction agent when the spatially dependent surface coverage of the reduction agent exceeds a maximum surface coverage of the reduction agent at one or more spatial locations.
    Type: Application
    Filed: August 22, 2008
    Publication date: February 26, 2009
    Inventors: Zhiyong WEI, Christopher Alan Sharp
  • Publication number: 20090049828
    Abstract: An emissions control system is disclosed. The emissions control system may have a power source that creates a flow of exhaust and a filtering device that receives the flow of exhaust. A first sensor may be located at or upstream of the filtering device, the first sensor being configured to measure a first temperature, and an SCR catalyst may be located downstream of the filtering device. The emissions control system may also have an injector configured to inject a reduction agent into the flow of exhaust in the presence of the SCR catalyst. The emissions control system may further have a controller in communication with the first sensor. The controller may be configured to predict a change in an ability of the SCR catalyst to store reduction agent using a measured change in the first temperature and adjust the injector according to the predicted change in the storage ability of the SCR catalyst.
    Type: Application
    Filed: August 20, 2007
    Publication date: February 26, 2009
    Inventors: Zhiyong Wei, Theodore M. Kostek, Christopher Alan Sharp
  • Publication number: 20090031710
    Abstract: An emissions control system is disclosed. The emissions control system may have an SCR device that receives a flow of exhaust. The emissions control system may also have an injector that introduces a reduction agent into the flow of exhaust at or upstream of a catalyst within the SCR device. The emissions control system may have a controller in communication with the injector, the controller being configured to calculate a first amount of the reduction agent by using an approximation that at least one of a plurality of SCR reactions must be completed before the remaining SCR reactions commence. The controller may also be configured to adjust the injector according to at least the first amount.
    Type: Application
    Filed: July 31, 2007
    Publication date: February 5, 2009
    Inventors: Zhiyong Wei, Cho Ying Liang
  • Publication number: 20080295499
    Abstract: An exhaust treatment system is provided having a first exhaust passageway fluidly connected to an engine. A particulate filter and a selective catalytic reduction catalyst are situated within the first exhaust passageway. In addition, the system has a first oxidation catalyst located within the first exhaust passageway upstream of the particulate filter and the selective catalytic reduction catalyst. The system also has a second exhaust passageway fluidly connected to the first exhaust passageway upstream and downstream of the first oxidation catalyst. The exhaust treatment system further has a sensor configured to sense a parameter indicative of an exhaust gas temperature. Furthermore, the system has a controller configured to direct exhaust gas through the first oxidation catalyst when the exhaust gas temperature is below a threshold temperature and direct the exhaust gas through the second exhaust passageway when the exhaust gas temperature is above the threshold temperature.
    Type: Application
    Filed: May 31, 2007
    Publication date: December 4, 2008
    Inventors: James Joshua Driscoll, Cho Ying Liang, Ronald Silver, Corey Marie Shannon, Zhiyong Wei
  • Patent number: D953252
    Type: Grant
    Filed: May 6, 2021
    Date of Patent: May 31, 2022
    Inventor: ZhiYong Wei